Noiseless clock mechanism



1623,266 AP! 5 1927. E. s. OSTLER NOISELESS CLOCK MECHANISM I Filed July 31, 1925 35 worm Patented Apr. 5, 1927.

UNITED STATES PATENT OFFICE.

ERNEST s. OSTLER, orcIIIcA'Go, ILLINOIS,

ASSIGNOR TO STROMBERG ELECTRIC COM- PANY, OF CHICAGO ILLINOIS, A CORPORATION OF MAINE.

NOISELESS cLocx' MECHANISM.

Application filed July 31,

clock of my invention is sh o,wn..

Figure I is a side elevation of a noiseless intermittent may be used in a secondary clock;

Fig. 2 is a section on the line 2-2 of Fig. l;

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1; and V F ig. 4 is a fragmentary View showing the position certain parts assumewhen the electromagnetis energized.

Referring to the drawings in detail, the construction shown comprises an intermittently energizable electromagnet 1, a three point armature 2 therefor, a shaft 3 on which the armature2 is mounted, a gear 4 mounted on this shaft, a pinion 5 meshing with the gear 4, a shaft 6 n' which the pinion is mounted, a crank. 7 mounted on the shaft 6, and a coil tension spring 8 secured to the crank 7. Only a part of the clock train is shown, as" this forms no part of the invention. The part. of the clock train shown comprises a worm wheel 9 mounted on the armature shaft 3 and a gear 10 meshing with this -worm wheel. i

The pitch diameter of the gear 4 is three times the pitch diameter of the pinion 5 meshing therewith so that thecrank 7 will revolvethree times for each revolution of the armature 2. The armature 2 is so positioned with respect tothe poles 11 of the .electromagnet 1 andthe other-parts are so designed that when the electromagnet is movement mechanism which 1925. Serial No. 47,238.

energized the crank 7 will move from the position shown in Fig. 1 to the position shown in Fig. 4, this movement being a little more than 180 and sufiicient to move the crank past its dead center position with respect to the line of action of the spring 8.

When the magnet is deenergized,'the spri'n completes the revolution of the crank 7 an completes the step of the armature of'the electromagnet, bringing this armature into position ready for the next step. i

What I claim as new and desire to secure .by Letters Patent of the U. S. is

1. A step-hy-step movement mechanism comprising an electromagnet, a revoluble armature therefor rotated ,apartial step when the magnet is energized, and means for completing said step comprising a revoluble crankdriven from said armature and a spring secured to said crank, said crank being rotated past the dead center of the line of spring action when the magnet is energized and the revolution of the crank.

being completed by the spring when the magnet is deenergized.

2. A step-by-step mechanism'comprising I an electromagnet,

a revoluble armature therefor rotated a partial step when the magnet-is energized, and means for completing said step when the magnet is deenergized comprising a revoluble member driven from said armature and rotated more than 180 and less than 360 when the armature is energized and rotated'the remainder of the 360 when the armature is deenergized, and speed change transmissionbetween said armatfire and revoluble member whereby the rotatable armature is rotated only a tram tional part of a-complete revolutionfor each complete revolution of the revdluble member. y

In witness whereof, I have hereunto subscribed my name.

ERNEST s. OSTLER. 

